Chapter Exam

Unit 12: Thermal Properties of Matter — Online MCQ Test

Q: Which of the following is the SI unit of heat?

Answer: A. Joule — Heat is a form of energy, and the SI unit of energy is joule.

Q: The process of transfer of heat by direct molecular collision in a substance is called:

Answer: A. Conduction — In conduction, heat is transferred from the hotter region to the colder region through collisions between neighboring particles.

Q: A metal rod is heated uniformly. What happens to its length?

Answer: B. It increases — Most solids expand on heating, so the length of the metal rod increases due to thermal expansion.

Q: Which of the following increases the rate of conduction through a metal rod?

Answer: C. Increasing cross-sectional area — The rate of conduction is directly proportional to cross-sectional area and temperature difference, and inversely proportional to length.

Q: Which statement about radiation is correct?

Answer: C. It is the fastest mode of heat transfer — Radiation transfers heat through electromagnetic waves and can travel through vacuum at the speed of light.

PHYSICS · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 12: Thermal Properties of Matter with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS. This chapter covers: This chapter covers temperature heat measurement thermal expansion specific heat capacity calorimetry latent heat and heat transfer mechanisms conduction convection radiation.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 12: Thermal Properties of Matter — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS — Unit 12: Thermal Properties of Matter, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is the SI unit of heat?

A. Joule ✓
B. Calorie
C. Kelvin
D. Watt

Answer: A. Joule
Heat is a form of energy, and the SI unit of energy is joule.

The process of transfer of heat by direct molecular collision in a substance is called:

A. Conduction ✓
B. Convection
C. Radiation
D. Evaporation

Answer: A. Conduction
In conduction, heat is transferred from the hotter region to the colder region through collisions between neighboring particles.

A metal rod is heated uniformly. What happens to its length?

A. It decreases
B. It increases ✓
C. It remains unchanged
D. It first decreases and then increases

Answer: B. It increases
Most solids expand on heating, so the length of the metal rod increases due to thermal expansion.

Which of the following increases the rate of conduction through a metal rod?

A. Decreasing temperature difference
B. Increasing length of the rod
C. Increasing cross-sectional area ✓
D. Using a material with lower thermal conductivity

Answer: C. Increasing cross-sectional area
The rate of conduction is directly proportional to cross-sectional area and temperature difference, and inversely proportional to length.

Which statement about radiation is correct?

A. It requires a material medium
B. It cannot occur in vacuum
C. It is the fastest mode of heat transfer ✓
D. It occurs only in solids

Answer: C. It is the fastest mode of heat transfer
Radiation transfers heat through electromagnetic waves and can travel through vacuum at the speed of light.

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